Conundrum Sphinx [Commander 2018] BW08 You can only activate 1

You can only activate 1 "Spellbook of Knowledge" per turn

You can only use each effect of "Altergeist Memorygant" once per turn

If this card is in your Graveyard: You can discard 1 "Destruction Sword" card

if this card battles a non-WIND monster: You can destroy that monster

Conundrum Sphinx [Commander 2018] BW08 You can only activate 1Set: Commander 2018 Type: Creature Sphinx Rarity: Rare Cost: {2}{U}{U} Flying Whenever Conundrum Sphinx attacks, each player chooses a card name. Then each player reveals the top card of their library. If the card a player revealed has the name they chose, that player puts it into their hand. If it doesn't, that player puts it on the bottom of their library.